Distribution of the displacement distance.

(A, B) Histograms showing the displacement distance distributions in the BFN group (A) and the PFNA group (B). Histograms are used in descriptive epidemiological studies. There was a significant difference in the displacement distance distribution between the two groups (p<0.001).</p

Reduction status and screw direction in the BFN and PFNA groups.

Reduction status and screw direction in the BFN and PFNA groups.</p

Demographic characteristics of the patients in the BFN and PFNA groups.

Demographic characteristics of the patients in the BFN and PFNA groups.</p

Computed tomography indices.

(A) Displacement distance. The displacement distance of the proximal fragment relative to the distal fragment was measured at the anterior wall of the fracture site. (B) Reduction status. The reduction status was classified as “anatomical type” when there was no displacement of the anterior walls of the fragments, and as “intramedullary type” or “extramedullary type” when the anterior wall of the proximal fragment was displaced posteriorly or anteriorly relative to the anterior wall of the distal fragment, respectively. (C) Screw direction. The screw direction was categorized according to the insertion and tip of the lag screw. When the insertion and tip of a screw were placed in the same area, the screw direction was considered have no deviation, and was categorized according to its position (A: Anterior; C: Central; P: Posterior). The screw direction was considered to show deviation when the insertion and tip were placed in different areas and was categorized as AP (from anterior to posterior) or PA (from posterior to anterior) according to the direction.</p

Data of BFN group and PFNA group.

(XLSX)</p

Appearance of the Best Fit Nail.

The Best Fit Nail (BFN) has a lag screw hole with a selectable anterior offset to the nail axis. The anterior offset of the BFNs used in the present study was 4 mm. (A) Nail central axis. (B) Lag screw hole central axis.</p